From: Jack Dempsey <dempsejn@...>
Date: 2002-02-07T05:57:13+09:00
Subject: RE: Regexp::Parser ported to Ruby...?

anyone know if using $& in ruby gives the same penalty as in perl?

> -----Original Message-----
> From: dave@thomases.com [mailto:dave@thomases.com]On Behalf Of Dave
> Thomas
> Sent: Wednesday, February 06, 2002 3:55 PM
> To: ruby-talk ML
> Subject: Re: Regexp::Parser ported to Ruby...?
> 
> 
> Tobias Reif <tobiasreif@pinkjuice.com> writes:
> 
> > > In Perl, you can execute arbitrary code in a regex.
> > > 
> > >   "japhy" =~ /((.)(?{ print "<$2>" }))+/;
> > >   # <j><a><p><h><y>
> > > 
> > > I guess that's not possible in Ruby?
> > 
> > 
> > One way:
> > 
> > irb(main):003:0> "japhy".gsub(/./)do print "<#{$&}>" end
> > <j><a><p><h><y>""
> 
> Or
> 
>    "japhy".scan(/./) { |ch| print "<#{ch}>" }
> 
> 
>